Diaphragm pump



FIG. 1 is a top plan view of a diaphragm pump showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is an opposite side elevational view thereof;

FIG. 5 is an end elevational view thereof, the opposite end being a mirror image; and

FIG. 6 is a top perspective view thereof.

The fluid hoses in FIGS. 3 and 4 are shown broken away to indicate indeterminate length, and the control lines in FIGS. 1, 2, and 3 are shown broken away for clarity of illustration. 

The ornamental design for a diaphragm pump, substantially as shown and described. 